The Bengals did not violate the NFL’s substitution rule when they caught the Browns‘ defense still huddling in the fourth quarter Sunday and quarterback Bruce Gradkowski alertly threw a 41-yard touchdown pass, a person familiar with the ruling told the Associated Press on Monday.

Gradkowski’s toss to rookie A.J. Green with 4:31 left came after a legal snap with 14 seconds left on the play clock, said the person who spoke on condition of anonymity because play reviews between the league and teams are kept confidential. The source said the Browns had “ample time” to substitute before the ill-fated play, which will now be added to Cleveland’s long list of heartbreaking plays.

As the Browns‘ defense was waiting for a call to come in from the sideline, the Bengals hurried to the line and snapped the ball. Green, who had not caught a pass the entire game, hauled in Gradkowski’s toss and easily outran cornerback Joe Haden for the TD to give Cincinnati a 20-17 lead.

“There are no excuses,” he said. “If they no-huddle or quick huddle, we have to get out there and cover. If that doesn’t happen properly, let’s call a timeout. It got snapped so quickly, we couldn’t really get it because you’re initially trying to get everybody where they need to be.

“It’s something we’ll work on. We’ll make sure it never happens again.”

Because players were not running on and off the field, there was nothing unusual about what was happening before the snap, the source said. If the side officials had determined the Bengals had gotten an unfair advantage, they would have raised their arms and stopped the play before the snap.

The only thing the officials failed to notice was that Cleveland had 12 players in the huddle.

With the Bengals facing a third-and-11, Cleveland’s coaching staff wanted to get the proper coverage package on the field. Defensive backs coach Jerome Henderson sent in rookie nickelback Buster Skrine, not realizing that Dimitri Patterson, who had sat out the previous play with an ankle injury, was already back on the field.